Add Kafka Consumer to Collector set

[gmcquillan]

I'd like to be able to process events from Kafka as well as logs from disk and emails from imap.

For an example check out: https://gist.github.com/7db14f27c4d115b355b3

[gmcquillan]

https://github.com/dsully/pykafka/tree/master/kafka
https://github.com/mozilla-services/zktools/tree/master/zktools <-- For reading out the offsets.

[gmcquillan]

pip install -e git+git://github.com/dsully/pykafka.git#egg=pykafka